Expressing apparatus



G. F. HAUF.

EXPRESSING APPARATUS.

APPucATloN man Nov. e. 1920. 1,41 0,301 Patented Mar. 21, 1922.

e o No anco G. F. HAUF.

EXPRESSING APPARATUS.

APPLICATION HLED Nov. 6, 1920.

1,41 0,301. A Patented Mar. 21, 1922.

3 SHEETS-SHEET Z.

G. F. HAUF.

EXPRESSING APPARATUS.

APPLICATION FILED Nov. 6, 1920.

Patented Mar. 21, 1922.

3 SHEETS-SHEET 3.

GEORGE F. I-IAUF, OF CHICAGO, ILLINOS, ASSEGNOR TO ROBERTSON BROTHERS MANU* FACTURING COMANY, fr CORPORATON F LLNOIS.

EXPRESSING APPARATUS.

Application filed November 6, 192D` To all whom, t 412.04/ concern.'

Be it known that l, GEORGE F. lviAUr, a citizen of the United States, residing at Chicago, in the county of Cool; and State of lllinois, have invented certain new and useful Improvements in Expressing Apparatus, of which the following is a specification.

llhisinvention relates to expressing apparatus.

It is particularly adapted for use with presses employed in expressing juices frein meat luy-products, vegetables, fruits, grains and the like.

Ordinarily the products from which the .extracts are taken are enclosed in cloth or fabric bags backed by wood or nietal lattice worl: racksA and subjected to pressure.

Such expediente have been found obj ectionf able because cloth bags quickly wear out and, in inany instances, can not be readily inade strong enough. with the required mesh. The lattice-work racks are objectionable because,

in order to provide the necessary drainage, f

the openings inust be so large that the bags often bulge into the openings and inuch et the pressure may be wasted. Di'l'liculty has also been ezzperieneed in obtaining the proper drainage for the expressed fluids. The tilling and emptying of the bags has also been a niatter of considerable diliculty.

One of the objects of this invention is to provide iniproifed apparatus for eiipressing1 processes.

Anotherobject .is'to provide an improved ban1 for use in expressing presses.

Another object is to improve the drainage from the bag.

lnother object is to provide a bag which.

is `substantially rigid and capablejof withstanding high pressure and severe serif'ice.

Specification of Letters Patent.

Patented Mar. 2li,` 1922.

Serial No. 422,262.

Fig. 5 is a top plan of a drain rack.

Fig. G is a side elevation thereof.

Fig. T is an end elevation thereof.

Fig. 8 is a diagrammatic end elevation of a press in bag filling position.

Fig. 9 is a diagraininatic end elevation of a press in pressing position, and

Fig. l() is a diagrammatic end elevation of a press in bag discharging position.

The bag comprises7 in general a pair of j )erforated side walls, a pair of hinged end walls and a hinged cover or seal.

The side walls are each made of a perforated piece of sheet metal l such as iron or steel. The metal used will depend to some extent upon the product pressed, such metal being selected as will least affect or be affected by the products pressed and eX- pressed.

The holes in the side walls may be punched therein and their size and number will depend upon the products treated.

Each side wall is supported and strengthcned by a framework to which the side. wall is secured. This framework comprises a top brace and support Q, side braces and l1 and a bottom brace The braces Vare sccured together by suitable means, such as butt welding, and are riveted, bolted, welded or otherwise securely :fastened upon the inside of their respective side walls. The two Atop braces 2 extend beyond the side walls to act as' suspension supports for the bag, as will be hereinafter set forth.

Each `end wall of the bag comprises a pair ol. per-itorated metal plates or strips (3. The plates forming each end are pivotally ,connected together along adjacent edges bv a hinge 7. The other edges of .each pair of plates arepivotally connected to the inner edges of the respective pair oit' side braces and i by hinges 8. The hinges may be of any suitable construction.

The two hinged end walls of the bag allow the ybag to be opened and closed or eX- `panded and contracted somewhat after the inanner of an accordion. The flexibility of the walls and hinges also allow soine distortion of the bag, that is the top and bottom thereof readily may 'be opened or closed relatively different amounts. This adapt ability of the bag allows the saine to bereadily Vfilled and emptied as will be hereinafter described.

The coter or of the bag comprises a pair of plates or strips l0. rlhese plates are pivotally connected along their outer edges to the lower edges ofthe two top braces 2 of the bag by hinges ll.. The inneredge of one plate is provided with a strip of angle iron 12. The inner edge of the other plate is provided with a strip of angle iron 13. Each angle iron extends slightly beyond the opposite ends of the bag. Angle iron '-13 is adapted to lit over angle iron 12` when the two plates forming the Cover are brought together. The two angle irons are hingedly locked together in this position by rings lll which, when the two seegether, are slipped over the opposite ends vof angle irons 12 and 13. These ringsv hold angle iron 12 within angle iron 13 toV effec` tively close and seal the top of the bag, but allow the angle irons to hinge upon each other as the bag is contracted and expanded.

Extending across each .side wall near the bottomthereof is a bar or strip l5. These stripsserve to provide a seal at the bottom of the bag when the lower ends of the side walls are brou ht together. `The seal prevents the expu sion of the material being pressed. Each bar has a sloping upper edge to offer less resistance to the passage of the compressed material, especially when emptying the bag. Y

The bags are Vreinforced and drainage therefrom is facilitated by providing a drain rack on each side thereof.

Figs. 5, 6 and 7 show a construction of drain rack which has been employed with success.

Each drain rack is made of aiflat pieceV of sheet metal 20. These sheets may be approximately of the same size and shape as the bags.

On opposite sides of sheet 20, corrugated sheets 2l are secured. The corrugations extend vertically of the rack.

Sheets and 2l are secured together in any suitable manner, such for exampleA as riveting or spot-welding the sametogether along the bases of the valleys of the corrugated sheets.

A bar 22 is secured in the to of the drain rack and extends beyondt e edges thereof at each end.V Bar 22 acts as a Vsuspension support for the drain rack.

. Figs. 8, 9 and l0 diagrammatically show a press in three stages of an expressing process and provided with bags and drain raclrs'as previously described.

The bags and racks may be usedA in other ways and on various typesof presses.

The press illustrated is ofthe type'com- Amonly known as a Berrigan press. Itlhas a pair of pressing platens 25. each of which is pivotally supportedfrom the base on pivoted levers 2 i The platensare 4moved toward and away from each other by hydraulic pressure acting through a cylinder 27, piston 28, piston rod 29 and levers 30. A suitable valve controls the operation of piston28 by governi ng the lflow of fluid to and from cylinder 2T. The lower ends of the pla-tens may be 11i-ade to approach each other and recede by suitable screw threaded rods 3l operated through a hand wheel 32.

The opposite ends of each platent are provided with brackets which support a pair of suspension bars 36. The projecting ends of the top bars of the bags and ldrain racks hang upon bars 36.V tions of the cover or seal are brought to- The expressing process is carried on as follows: 'n

The desired number of bags and drain raclis are hung between the platens of the press from the suspension bars. Each bag has ya drain raclr oneach side and drain racks are positioned between ythe outside walls of each end bag and the adjacent platen. rlfhe corrugations or grooves in the drainracks are vertically disposed to i provide a large number of channels for the ready flow of the expressed Afluids. The drain racks engage the side walls of the bags only ou the lines of contact of theV apices of the ridges of the corrugations, and consequently offer little obstruction to the passage of the expressed fluids through the perforated side walls ofthe bag.` The lines of contact, however, because .they areyclose together and extend throughout the entire depth of the bag, distribute the vpressure uniformly and prevent bulging.`

The hinged covers of the bags are swung open so that the bags may be filled rapidly.

l/Vhen the desired number of bags and racks have been hung between the platens, the lower ends of the bags are closed by turning hand wheel 32 to bring'the lower.

ends of the platens nearer together. /This bringsthe bottom sealing bars 15 of the respective `bags together effectively closing the bottoms of all of the bags;

The apparatus is now in filling position shown by F ig. 8.

The bags are then filled. with the material V to be pressed.

`When the bags are all sufficiently filled the cover plates are Vswung together and locked by the rings 1li. y

The hydraulic cylinder vis now operated to bring the platens of the press together.

During this pressing operation the hinged apices of the end andtop walls of the bags move outwardly as the sidewalls approach each other.V The expressed Afluids pass through the Vperforations in the side and Vend walls into any suitable receptacle, The

Huid 'which passes through the sidev walls flows down the channels in the drain racks. ig. 9 shows a stage ofthe pressing operation. f

Pressure is applied and maintained until the material pressed has given up its expressible lfluid and then the lower ends of the bags are opened by turning hand Wheel l2 to separate the lower ends of the platens. The discharging stage is shown in `Fig. l0.

The material remaining in the bags may have heen pressed to a calze which, when the lower ends of the bags are opened, Will drop into any suitable. receptacle placed there beneath.

Having described my invention what I claim as new and desire to secure by Letters Patent is l.. Expressing apparatus comprising a bag having hinged collapsible ends, and a corrugated rack for distributing pressure uniforinly to the bag and providing drain chair nels for fluid expressed from material Within the bag.

2. Expressing apparatus comprising a metallic bag having hinged collapsible and expansihle ends and top, and a channeledracli for distributing` presure uniformly to the sides of the bag and acting to convey Jfluid expressed from material Within the bag.

3. Expressing apparatus comprising a metallic bag having perforated side Walls and collapsible and expansible ends, a cover hinged to the side Walls, and corrugated rack providing channels for draining fluid passing out through the perforations in the sic e 'walls of the bag and distributing pressure uniformly to the side walls of the bag.

A`il. fr bag for expressing processes, having a pair of perforated side Walls, a pair of collapsible and expansiblc ends, each end comprising a pair of plates hinged together and to the respective side Walls,y and a top comprising a pair of plates hinged on one edge to the opposite side Walls and hingedly fitting together along adjacent edges.

5. A bag for expressing processes, having a pair of perforated metallic side Walls, a pair of collapsible and expansible ends, each end comprising a pair of plates hinged together along adjacent edges and hinged to lthe opposite side Walls along their other edges, and a cover which may be opened for filling the bag and closed to seal the top of the bag.

6. A bag for expressing processes having a pair of perforated metallic side Walls, a pair of metallic collapsible and expansible ends, each end comprising a pair of plates hinged together and te the side walls, a cover coniprising a pair of plates each hinged along one edge to one of the side Walls, and interlocking means along adjacent edges of the plates forming the cover to temporarily hinge the saine together and seal the tep of the bag.

7. Expressing apparat-us comprising a metallic bag having perforated side Walls joined together by hinged sides and top, a corrugated drain rack for communicating pressure to the side Walls of the bag and conveying fluids expressed from material Within the bag, and means for supporting the bag and rack and imparting pressure thereto.

8. j A bag for expressingprocesses comprising a pair of relatively rigid side Walls, and a pair of interconnecting collapsiblel and expansible end Walls secured thereto.

9. A bag for expressing processes comprising a pair of relatively rigid side Walls, one of said Walls being perforated to allow passage of a fluid therethrough, and a pair of interconnecting expansible and collapsible end 'Walls hingedly secured thereto.

In testimony Wjhereof 'I hereunto subscribe my name.

GEORGE F. ii-ninrj 

